1ENUM IEEE80211_HW_FL(9) The basic mac80211 driver inte ENUM IEEE80211_HW_FL(9)
2
6 enum_ieee80211_hw_flags - hardware flags
7
9 enum ieee80211_hw_flags {
10 IEEE80211_HW_HAS_RATE_CONTROL,
11 IEEE80211_HW_RX_INCLUDES_FCS,
12 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING,
13 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE,
14 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE,
15 IEEE80211_HW_SIGNAL_UNSPEC,
16 IEEE80211_HW_SIGNAL_DBM,
17 IEEE80211_HW_SPECTRUM_MGMT,
18 IEEE80211_HW_AMPDU_AGGREGATION,
19 IEEE80211_HW_SUPPORTS_PS,
20 IEEE80211_HW_PS_NULLFUNC_STACK,
21 IEEE80211_HW_SUPPORTS_DYNAMIC_PS,
22 IEEE80211_HW_MFP_CAPABLE,
23 IEEE80211_HW_BEACON_FILTER,
24 IEEE80211_HW_SUPPORTS_STATIC_SMPS,
25 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS,
26 IEEE80211_HW_SUPPORTS_UAPSD,
27 IEEE80211_HW_REPORTS_TX_ACK_STATUS,
28 IEEE80211_HW_CONNECTION_MONITOR,
29 IEEE80211_HW_SUPPORTS_CQM_RSSI
30 };
31
33 IEEE80211_HW_HAS_RATE_CONTROL
34 The hardware or firmware includes rate control, and cannot be
35 controlled by the stack. As such, no rate control algorithm should
36 be instantiated, and the TX rate reported to userspace will be
37 taken from the TX status instead of the rate control algorithm.
38 Note that this requires that the driver implement a number of
39 callbacks so it has the correct information, it needs to have the
40 set_rts_threshold callback and must look at the BSS config
41 use_cts_prot for G/N protection, use_short_slot for slot timing in
42 2.4 GHz and use_short_preamble for preambles for CCK frames.
43 IEEE80211_HW_RX_INCLUDES_FCS
45 Indicates that received frames passed to the stack include the FCS
46 at the end.
47 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING
49 Some wireless LAN chipsets buffer broadcast/multicast frames for
50 power saving stations in the hardware/firmware and others rely on
51 the host system for such buffering. This option is used to
52 configure the IEEE 802.11 upper layer to buffer broadcast and
53 multicast frames when there are power saving stations so that the
54 driver can fetch them with ieee80211_get_buffered_bc.
55 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE
57 Hardware is not capable of short slot operation on the 2.4 GHz
58 band.
59 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE
61 Hardware is not capable of receiving frames with short preamble on
62 the 2.4 GHz band.
63 IEEE80211_HW_SIGNAL_UNSPEC
65 Hardware can provide signal values but we don't know its units. We
66 expect values between 0 and max_signal. If possible please provide
67 dB or dBm instead.
68 IEEE80211_HW_SIGNAL_DBM
70 Hardware gives signal values in dBm, decibel difference from one
71 milliwatt. This is the preferred method since it is standardized
72 between different devices. max_signal does not need to be set.
73 IEEE80211_HW_SPECTRUM_MGMT
75 Hardware supports spectrum management defined in 802.11h
76 Measurement, Channel Switch, Quieting, TPC
77 IEEE80211_HW_AMPDU_AGGREGATION
79 Hardware supports 11n A-MPDU aggregation.
80 IEEE80211_HW_SUPPORTS_PS
82 Hardware has power save support (i.e. can go to sleep).
83 IEEE80211_HW_PS_NULLFUNC_STACK
85 Hardware requires nullfunc frame handling in stack, implies stack
86 support for dynamic PS.
87 IEEE80211_HW_SUPPORTS_DYNAMIC_PS
89 Hardware has support for dynamic PS.
90 IEEE80211_HW_MFP_CAPABLE
92 Hardware supports management frame protection (MFP, IEEE 802.11w).
93 IEEE80211_HW_BEACON_FILTER
95 Hardware supports dropping of irrelevant beacon frames to avoid
96 waking up cpu.
97 IEEE80211_HW_SUPPORTS_STATIC_SMPS
99 Hardware supports static spatial multiplexing powersave, ie. can
100 turn off all but one chain even on HT connections that should be
101 using more chains.
102 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS
104 Hardware supports dynamic spatial multiplexing powersave, ie. can
105 turn off all but one chain and then wake the rest up as required
106 after, for example, rts/cts handshake.
107 IEEE80211_HW_SUPPORTS_UAPSD
109 Hardware supports Unscheduled Automatic Power Save Delivery
110 (U-APSD) in managed mode. The mode is configured with conf_tx
111 operation.
112 IEEE80211_HW_REPORTS_TX_ACK_STATUS
114 Hardware can provide ack status reports of Tx frames to the stack.
115 IEEE80211_HW_CONNECTION_MONITOR
117 The hardware performs its own connection monitoring, including
118 periodic keep-alives to the AP and probing the AP on beacon loss.
119 When this flag is set, signaling beacon-loss will cause an
120 immediate change to disassociated state.
121 IEEE80211_HW_SUPPORTS_CQM_RSSI
123 Hardware can do connection quality monitoring - i.e. it can monitor
124 connection quality related parameters, such as the RSSI level and
125 provide notifications if configured trigger levels are reached.
126
128 These flags are used to indicate hardware capabilities to the stack.
129 Generally, flags here should have their meaning done in a way that the
130 simplest hardware doesn't need setting any particular flags. There are
131 some exceptions to this rule, however, so you are advised to review
132 these flags carefully.
133
135 Johannes Berg <johannes@sipsolutions.net>
136 Author.
137
139Kernel Hackers Manual 2.6. November 2011 ENUM IEEE80211_HW_FL(9)